Raimey and Mike, I've turned the "Fred Adolph" over to my favorite gunsmith, Mike Merker now that I'm back in Hendersonville, NC. He's going to repair/replace the rifle firing pin, do a chamber cast to solve this caliber thing once and for all. BTW, we tried a 6.5x55 Swede and a 6.5x55 Mauser and both of their cartridge bodies were to thick to seat in the chamber. He's guessing the cast will confirm it's a 6.5x54 Mannlicher-Schoenauer, even though the proof mark says "6.4x55". Will let you guys know what we learn. Thanks for everyone's help on this.
